Warp stop motion for looms



A. E. RHOADES WARP STOP MOTION FOR LOOMS v Aug. 7, 11923. 31,464,485

Filed July 24 1922 O 31/26 5 Fig.1. 24 Figl \nvenTor.

I Ahmgo ERhoudes AiTys.

Patented Aug. 7, 1923.

narren rr metres ALONZO E. RHOADES OF I-IOPEDALE, MASSACHUSETTS, ASSIGNOR TO DBAPER CORPO- RATION, OF HOPEDALE, MASSACHUSETTS, A CORPORATION OF MAINE.

WARP STOP BIOTION FOR LOOMS.

Application filed July 24, 1922.

Looms, of which the following description,

in connection with the accompanying drawing, is a specification, like characters on the drawing representing like parts.

This invention relates to Warp stop motions for looms and more particularly to means for indicatlng the locatlon of a dropped detector and the broken or abnormally loose warp, which has caused the loom to stop, so that the operator may read: ily locate and piece or place in proper con-v dition the warp and start the loom.

The invention is an improvement upon an indicatin means disclosed in the applica tion of atrick Keegan, Serial #575,523 fil e d July 17, 1922. I

F The object of the invention is to provide a simple and eflicient form of mechanism which may readily be embodied in existing warp stop motions with a minimum amount of labor and expense. The object of the invention is further to provide a construction of indicating mechanism of a simple,

positive and accurate nature and one not re-' quiring any springs.

The nature and objects of the invention will appear more fully from the accompanying description and drawings and will be particularly pointed out in the claims.

In the drawings:

Fig. 1 is a front elevation of'a portion of a detecting mechanism embodying a preferred form of the present invention;

Fig. 2 is a View in end elevation and partially in vertical cross section looking toward the left of Fig. 1.

Fig. 3 is a top view enlarged of a small section of one of the banks of the detectors and the warps corresponding thereto;

Fig. 4 is a view similar to F ig.- 3 showing a dropped detector in twisted position with portions of the grasping bars by which the twisting action is secured.

A simple and preferred embodiment of the invention is illustrated in the accompanying drawings as applied to the well known metal pieces 8.

Serial No. 577,164.

Northrop type of loom and in connection with a well known type of warp stop motion.

The invention is an improvement upon that disclosed in the application of Patrick Keegan aforesaid. It is, therefore, necessary to illustrate or describe in detailonly those features of the construction of the loom directly concerned with the present improvement.

In this type of warp stop motion mechanism the detecting mechanism is mounted in a suitable position in the rear of the.

harness frames at the top of the loom. For this purpose a suitable frame work connected to and supported by the loom frame extends transversely of the loom in the required position. One of the supporting brackets 1 by which this frame work is secured to the loom frame at the left hand side is illustr-ated. This frame work at each end comprises a suitable head 2 mounted upon the support 1 and secured thereto by a bolt 3. Between the heads and extending transversely of the loom directly beneath the warp sheet extend the longitudinal parallel flat bars 4; and 5. The warps 6 as they pass from the warp beam to the shed forming mechanism rest upon and are supported by.

the upper edges of these bars at opposite sides of the detectors. If, as herein illustrated, there is more than one bank of detectors, intermediate supporting rods such as 7 are provided extending between the heads 2 parallel with the bars 4 and 5 to support the warps between banks of de tectors.

The detectors are in the form of thin, fiat Each detector is provided with an aperture 9 through which its warp passes so that normally each detector is supported by the warp with the apertures 9 in the same plane as the top surfaces of the bars The detectors are f and 5 and the rod 7. guided so as to move vertically by means of long, vertical slots 10 formed therein and fitting over the flat, vertically disposed detector guide bars 11 which also extend trans versely between the heads 2.

The detectors areshown as arranged in two banks but the number may be varied as desired.

When a Warp breaks or becomes unduly slackened the corresponding detector drops vertically and, in this type of mechanism, the lower end of the dropped detector comes between the serrated edges of a fixed bar or plate and of a rocking feeler bar.

This rocking feeler bar is constantly rocked by a moving part of the loom in a well known manner. Consequently its rocking motion is restrained by a dropped detector and this restraint of motion. is utilized in a familiar manner to effect the stopping of the loom.

, In the construction illustrated the fixed bar orplate 12 for the front bank of detectors is secured to the bottom of the bar f with its serrated edge 13 projecting rearwardly and the nxed bar or plate l t for the rear bankof detectors is secured to the bottom of the bar 5 with its serrated edge 15 projecting forwardly. The rocking feeler bar 16 extends in longitudinal parallelism with the bars 12 and 14 and is serrated at both of its edges 17 and 18 so as to cooperate with both. rocking movement from a shaft 19upon which it is mounted by arms 20 secured to able hearings in the bracket arms 21, one of 7 the shaft. This shaft 19 is mounted in suitwhich is shown in Fig. 1.

The construction thus far described is a familiar one to those skilled in'the art. In

' this invention,however, the shaft 19, is not only journaled to rock in the bearings 21 but it also is capable of sliding longitudinally in the said bearings. During the normal operation of the stop motion mechanism only the rocking movement of the shaft 19 is utilized .and the loom is stopped inthe usual manner upon the dropping of a detector and the restraining thereby of this rocking movement.

The present invention is concerned solely with the means for indicating the position of the dropped detector. The large number or warps in the sheet and the inconspicuous character of the detectors render it very difficult for the operator to locate the dropped detector and the broken or slackened warp after the loom has been stopped. This invention utilizes the principle of the invention of the said Patrick Keegan wherein,

after the loom is stopped, the dropped detector is twisted by a manual operation out of arallelism with the other detectors, thus spreading apart the detectors and the warp and enabling the operator readily to observe the location of the dropped detector.

This twisting movement of the dropped detector is effected by sliding the feeler bar 16 longitudinally after ithas grasped the dropped detector between its serrated edge and the serrated edge of the cooperating fixed bar 12 or 14. p This sliding movement This fecle'r bar 16 secures its nected thereto, as by means of the'set screw 23, and extending radially therefrom. This arm. may conveniently be located near one end of the shaft 19. A lever 24 is mounted in a generally verticalposition and preferably at one end of the detector supporting frame.

and the length of the lever is such that-this handle is in a position readily'to be reached- At its'lower end this lever is connected at 25 to the arm 22. Its upper end; is shaped as at 26 to form a suitable handle by the operator. This-lever is fulcrumed in an eye or loop27 extending from the'sup porting frame.

It will, therefore, be seen-that, after the loom is stopped by a dropped detector, all' that the'operator has to do isto seize the handle 26 and move it transversely of the loom thereby, through the connections described, directly and positively sliding the feeler bar 16 longitudinally and twisting the dropped detector into a position such as shown in Fig. 1.

. This mechanism is'very readily applied'to existingwarp stop motions because a very similar construction has heretofore been provided for rocking or jiggling'manually the feeler ban But in thatcase the part corresponding to the lever 241 11313 had no function of a lever and has beenso guided on the supporting frame as to move vertically. The mechanical changes, however, which are necessary to convertthis old type of mechanism into one embodying the present invention are comparatively slight. It IS only necessary to changethe mounting of .the part corresponding to 24: so as to turn this part into a lever and then to remove fromthe mechanism any parts which prevcntlongitudinal movement of theshaft 19.

It willthus be seen that the indicating I mechanism is'of a very simple type, that it eliminates 'any'spring action, that it is positive in. its operation, and-that it is readly controlled manually by the operator-'toflgive the desired twist to thedroppedidetector.

Having thus described invention, what I claim as new" and desire to secure by Letters Patent, is a v i 1. 'In a warp stop motion for' loorn's'a cooperating bar carried by the shaft and extending longitudinally alongside of and beneath the opposite set of edges of the detectors, means operated by a moving part of the 100111 to rock the shaft and cause the cooperating bar with the fixed bar to grasp, a dropped detector to effect the stopping of the loom, an arm connected to and extendinrr radially from the shaft, a lever fulcrumed on the loom frame, connected to the arm and extending within reach of the operator, whereby, after the loom is stopped, the operator by swinging the lever may slide the shaft longitudinally and thereby twist the dropped detector out of parallelism with the other detectors and thus indicate the position of the dropped detector.

2. In a warp stop motion mechanism for looms of the type described, journal bearings supported from the loom frame, a shaft mounted to rock and slide in said bearings, a feeler bar supported from said shaft in parallelism therewith, an arm connected to and extending radially from the shaft, a lever fulcrumed 0n the loom frame, connected to the arm and extending within reach of the operator, whereby, after the loom is stopped, the operator by swinging the lever may slide the shaft longitudinally and thereby twist the dropped detector out of parallelism with the other detectors and thus indicate the position of the dropped detector. In testimony whereof, I have signed my name to this specification.

ALONZO E. nnoanns. 

